Insulator attachment.



PATENTED MAR. 13, 1906.

H. SWANSON.

AGHMENT.

APR.26,1905.

INSULATOR ATT APPLICATION FILED 1 mm OFFICE.

HANS SWANSON, OF WARREN, MINNESOTA.

INSULATOR ATTACHMENT.

Specification of Letters Patent.

ratenteu Maren 13, 1906.

Application filed April 26, 1905. Serial No. 257,616.

To all whom it may concern/.-

Be it known that I, HANS SWANSON, a citizen of the United States, residing at Warren, in the county of Marshall and State of Minnesota, have invented a new and useful Insulator Attachment, of which the following is a specificationv This invention relates to wireclamping means for insulators of that class employed for stringing wire on overhead su ports and the like, and has for its principa object to provide a novel means for rigidly clamping and holding a line-Wire in such manner as to permit of the ready placing of the wire in position and its ready removal from the insulator.

A further object of the invention is to provide a device of this class in which the work of taking up slack, which must be accomplished more or less frequently on all lines, is rendered less difficult and expensive.

' With these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages o the invention.

In the accompanying drawings, Figure 1 is a sectional elevation of an insulator provided with a wire-clamping means constructed in accordance with the invention. Fig. 2 is a sectional plan view of the same on the line 2 2 of Fig. 1.

Similar characters of reference are employed to indicate corresponding parts throughout both the figures of the drawings.

The insulator is shown in the present in stance as of that t pe of glass insulator extensively employe provided with a groove y for the reception of the tie-wire. Incarrying out the present invention a loop 10, which may be formed of any suitable material-for convenience, a single or double loop of wire-is placed within the groove y, the 00p being extended at one side to form a fulcrum for a cam-lever 11. This lever has a cam-shaped nose 12 for engagement with the line-wire z, and viewed transversely the cam-face is curved on a line corresponding to the curvature of the pcfor overhead work and riphery of the insulator, no sharp edges being formed at a point which would tend to cut or otherwise injure the line-wire. The cam is provided With an elongated handle 13, which when in clamping position is disposed in an approximately vertical plane with the opening 14 or fulcrum-point of the cam at a point in a horizontal plane below the axis or center of the line-wire a, so that the tension of the supporting-loop 10 will automatically lock the cam in place and the wire will befirmly gripped between the nose of the cam and the inner wall of the groove, it being found in practice that the wire may be held with SllffiGiBIlt force to prevent any slipping under a stress less than that suificient to break the wire. The rounded face of the nose 12 slightly curves the wire against the similarly-curved face of the insulator, and this to some extent adds to the effici'ency of the clamp.

When placing the clamps in position, the loops, with the clamping-cams already in position thereon, are carried by the linemen, and the loop is simply slipped over the insulator, and after the line-wire is adjusted to position the clamp is forced from the dottedline position shown in Fig. 1 to the full-line position shown in said figure and the operation is completev It is necessary at times to take up slack of the line-wires, and to accomplish this under ordinary conditions the usual tie-wires are cut, and after the wire is held taut new tiewires are placed in position, this operation requiring considerable time and labor. With a clamp constructed in accordance with the present invention it is merely necessary to move the clamp from the full-line position shown in Fig. 1 to the dotted-line position and then after pulling the wire taut to move the clamp to locking position.

Having thus described the invention, what is claimed is 1. Awire-clamp of the class described, comprising a cam-lever, a fulcrum-loop supporting the lever and adapted to surround the insulator, the cam being arranged to engage against the face of the Wire, and the lever being movable to a locking position in a direction at right angles to the length of the wire.

2. Awire-clamp of the class described, com prising a cam-lever, and a fulorum-loop arranged to surround the insulator, the wireengaging face of the cam being concaved.

3. Awire-clamp of the class described, com- 10 the insulator, the cam having an elongated Bliss? operating-handle arranged at a right angle to the length of the Wire to be clamped.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

HANS SWANSON.

Witnesses:

C. F. SLEE, GEORGE G. JoHNsoN. 

